Appendix A: Connectors and Connection Media
1.
1000BASE-T/100BASE-TX/10BASE-T Ports
The 1000BASE-T/100BASE-TX/10BASE-T is a port that supports adaptation of three rates, and automatic
MDI/MDIX Crossover at these three rates. 1000The 1000BASE-T complies with IEEE 802.3ab, and uses the cable
of 100-ohm Category-5 or Supper Category-5 UTP or STP, which can be up to 100 m. 1000The 1000BASE-T port
uses four pairs of wires for transmission, all of which must be connected. 1000Figure A-1 shows the connections of
the twisted pairs used by the 1000BASE-T port.
Figure A-1
Schematic diagram for the four twisted pairs of the 1000BASE-T
Straight-Through
Crossover
Switch Switch
1TP0+ 1TP0+
2TP0- 2TP0-
3TP1+ 3TP1+
6TP1- 6TP1-
4TP2+ 4TP2+
5TP2- 5TP2-
7TP3+ 7TP3+
8TP3- 8TP3-
Switch Switch
1TP0+ 1TP0+
2TP0- 2TP0-
3TP1+ 3TP1+
6TP1- 6TP1-
4TP2+ 4TP2+
5TP2- 5TP2-
7TP3+ 7TP3+
8TP3- 8TP3-
In addition to the above cables, the 100BASE-TX/10BASE-T can also use 100-ohm Category-3, 4, 5 cables for 10
Mbps, and 100-ohm Category-5 cables for 100 Mbps, both of which can be up to 100 m. Figure A-2 shows the
pinouts of the 100BASE-TX/10BASE-T.
Figure A-2
Pinouts of the 100BASE-TX/10BASE-T
Figure A-3 shows the straight-through and crossover cable connections for the 100BASE-TX/10BASE-T.
Figure A-3
Connections of the twisted pairs of the 100BASE-TX/10BASE-T
Straight-Through
Crossover
